Lamp.



c. H. SMITH.

LAMP.

APPLICATION FIL'ED MAY 8, I91].

Patented July 27, 1915.

TED @TA s PATENT emce- CHARLES HAZOR SMITH, OF CHICAGO, ILLINOIS,.ASSIGNOR TO THE MANTLE LAMP COMPANY OF AMERICA, OF CHICAGO, ILLINOIS, ACORI'ORA'IION OF ILLINOIS.

LAMP.

Application filed May 8, 1911.

To all whom it may concern:

SMITH, a citizen ofthe United States, re-

siding at Chicago, in the, county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Lamps; and I do herebydeclare the following to be a full, clear, and exact description of thein vention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in vapor gas lamps. p

The objects are to provide means for regulating the volume ofair whichis drawn into the mixing chamber, also to provide an adjustable shadeholder that will permit the shade to be set higher or lower according tothe requirements of the user.

It is a well known fact that vapor gas from kerosene (coal oil) iscomposed of carbon and hydrogen gases, which must be mixed with oxygenin certain proportions in order to produce and sustain the nonluminousflame that is required to heat a mantle to a full glow. In normal air,containing the usual amount of oxygen, the volume of air is about 92parts to 8 parts gas. This volume of air is sufficient to supply therequired amount of oxygen to produce perfect combustion and sustain thenon-luminous flame under normal conditions, but under conditions,'like acrowded and insufficiently ventilated room, the air may be so vitiatedthat it lacks the normal amount of oxygen, hence, a larger volume of airmust be introduced and mixed with the vapor gas in order to maintain theproper proportion of oxygen or the flame will change to the yellow flamewhich does not require so much oxygen and from which the unconsumed partof the carbon is thrown off in smoke.

It is an easily recognized fact that wher 92% of air and 8% of vapor gasare to be mixed in a small mixing chamber, the air must move abouttwelve times as fast as the vapor gas rises. means of the draft of thechimney in conjunction with the size and arrangement of the airopenings. Therefore, any increase of power or draft will necessarilyincrease the speed of the air through the intake openings, and throughthe mixing chamber,

thereby introducing a larger volume of air Specification of LettersPatent.

This is accomplished by Serial N0. 625,777.

without increasing the regular flow of vapor gas.

It is safe to assumev that normal air at the ordinary altitude containsthe maximum amount of oxygen and'that only such conditions as tend todeplete the air' of its oxygen need be taken into consideration inconnectionwith the auxiliary chimney. Theseconditions are so variable onaccountof altitudes and ventilation that an adjustabledevice forregulating the volume of air is a prime necessity.

My invention consists of an adjustable auxiliary chimney, which is inalinement with or telescopically connected to the chimney, and therebyadjusts or regulates the draft to any desired power, and of anextensible shade holder which permits the shade to be set at any desiredheight. The auxiliary chimney and the shade holder are Patented July 2?,1915.,

connected together and both are adjustable shade holderis alsoadjustable with respect to said auxiliary chimney.

In, carrying out my invention, I provide an adjustable auxiliary chimneyand an adjustable shade holder, the latter being adjustably attached tothe lower end of the former by any suitable means, so that as theauxiliary chimney is raised or lowered, the shade holder is movedcorrespondingly. The shade holder is also adjustable on the auxiliarychimney.

The auxiliary chimney is connected to an arm or bracket which isadjustably attached to a suitable support. By this means, I am enabledto set the auxiliary chimney at any desired height, also to increase ordiminish the radius of the circle to which the direct rays of the lightextend outwardly from the lower edge of the adjustable shade, therebyadapting the lamp to better serveits purpose under varying conditions ofits use. This adaptability of my lamp renders it an ideal one for use inoiiices, libraries, lodge rooms and pulpits, as well as at home underthe varying conditions of its use there The provision for adjusting thedraft by adapting the auxiliary chimney to extend down more or less asmay be desired over the usual transparent, or glass, chimney, rendersthe lamp especially desirable for use in public places when it isrequired to burn for many hours with little or no attention. The

adjustable draft is also useful when removing the lamp from a materiallylower to a materially higher altitude, as well as under materiallydifferent conditions of the atmosphere at the same altitude. In order tokeep the auxiliary chimney from becoming overheated, I provide it withan inner tube of somewhat reduced diameter in order to secure an airspace between the two. This inner tube is preferably of greater lengththan the auxiliary chimney within which it is placed. It will beunderstood that the upper end of the ordinary chimney, which rests onthe burner, extends up to, or more or less into, the auxiliary chimney,whereby the draft may be regulated by extending the auxiliary chimneymore or less over the burner chimney. The adjustability of the shadeholder upon the auxiliary chimney permits the latter to be moved up ordown for regulating the draft while maintaining view of the shade holderalone, and Fig. 5

is a horizontal section on the line 0-0 of Fig. 2.

Referring to the drawings, 1 is a base having a standard, 2, upon whichis mounted one or more burners, 3, as desired, by any suitable means.The standard is inclosed by a sleeve 2 which fits closely around it andpreferably extends throughout its length.

1 is an oil reservoir.

5 is an auxiliary chimney supported by a suitable bracket 6, which isadjustable upon the sleevesQ, said bracket being mounted on the sleeveby spaced supports.

To prevent the shade holder and adjustable, or auxiliary chimney fromaccidentally falling or dropping and thereby breaking or injuring any ofthe parts of the lamp, I provide means, as for example a collar 6 whichis adjustably secured to the sleeve, to serve as 'a stop for the slidingbracket, 6, to which the auxiliary chimney is attached in any suitablemanner.

8 is a shade which is adjustably secured to the lower end of theauxiliary chimney in a manner to be presently explained.

In adjusting the auxiliary chimney and shade holder, the bracket isplaced at the desired elevation on the sleeve and is secured thereto, asby a set screw 9. The burner, as illustrated, is also adjustable on thesleeve and is held at its various positions by a set screw 9 A collar 8fast on the sleeve, limits the downward movement of said burner. Thesecuring of the burner and full i auxiliary chimney, at their variousadjustments, upon the sleeve 2 which is free to ard in either directionby engaging only one.

As already explained, the auxiliary chimney comprises two concentrictubular members, designated 5 and 5 The outer tubular member 5 isprovided with a series of perforations 10 to permit air to pass into andup between it and the inner tubular member 55 for keeping the outersection cool. i

The shade holder 11, which supports the shade 8, is formed with anupwardly extending flange 12 fitting between the inner and outersections of the auxiliary chimney. A plurality of inclined slots 13 areformed preferably equidistant apart in said flange. Screws or pins 14,similar in number and location to said slots, and all in the samehorizontal plane, are pressed through the sections of the auxiliarychimney and the respective slots. Each of said slots is provided with anumber of notches 15 in its upper lateral edge into which the screws orpins 14 may be lodged for supporting the slide at different locationsupon the auxiliary chimney. To change the position of the shade holderupon said auxiliary chimney, the former is first raised slightly in avertical direction, to disengage the notches 15 from the pins or screws1 1-, and then turn either to the right or left for raising or loweringthe shade, until said'screws engage the notches which will support theshade at the desired level. Said shade holder has a series ofperforations 11 therein for egress of heated air from the interior ofthe shade. I have shown my auxiliary chimney equipped with a smokearresting canopy 16 supported on legs 17 reaching down into the upperend of said auxiliary chimney and having offsets 18 engaging the topedge thereof. It

is preferable to use such a canopy upon the lamp but it does notconstitute any part of on, a chimney carried by said burner, anauxiliary chimney adapted to telescope said burner chimney, and meansfor supporting said auxiliary chimney on the standard at varyingdistances relativeto the burner to increase or diminish the volume ofair drawn into the burner.

2. In an incandescent lamp, a standard, a sleeve mounted to turn freelythereon, a burner adjustably mounted on said sleeve, a main chimney, andan auxiliary chimney mounted on said sleeve and adjustable relative tothe main chimney.

3. In a lamp, a burner having a main chimney, an auxiliary chimneyadapted to telescope said main chimney, and means to support saidauxiliary chimney relative to said main chimney.

4. In a lamp, the combination, with a base and a standard carriedthereby, of a sleeve supported on the base to turn freely around saidstandard, a burner, a main chimney, an auxiliary chimney, and a shade,said auxiliary chimney and shade being independently mounted on thesleeve and adjustable with reference to the main chimney and burner.

5. The combination with a burner and a chimney of a lamp, of anauxiliary chimney, a shade holder secured thereto, a shade supported bysaid shade holder and ventilating means within said shade holder for theegress of heated air from the shade and chimney.

6. The combination with a burner and a chimney of a lamp, of anauxiliary chimney in two parts, the inner part substantially concentricwith the outer part, means for retaining said parts in such relation toeach other, and a shade holder adjustably mounted between saidconcentric members of the auxiliary chimney. V g

7. The combination with a burner, a chimney and means for supportingsaid burner, of an auxiliary chimney composed of two tubular sections,the inner section extending below the outer section, and a shade holderattached to said outer section independent of the burner supportingmeans.

8. The combination with a burner and a chimney, of an auxiliary chimneycomprising two separated concentric sections, the outer section having aseries of perforations for the admission of cool air to, and to passthrough, the space between said sections, and a shade holder secured tothe lower end of said auxiliary chimney and having a series ofperforations therein for the egress of heated air.

9. The combination, with a burner and a chimney of a lamp, of anauxiliary chimney having a shade holder adjustably mounted thereon, andmeans whereby said shade holder may be retained at various positionsrelative to the burner.

10. The combination, with a burner and a chimney of a lamp, of anauxiliary chimney,

taining the shade holder at various positions upon the auxiliarychimney.

11. The combination, with a burner and a chimney of alamp, of anadjustable auxiliarv chimney, a shade holder having a flange.

overlapping the lower end of the auxiliary chimney, said flangecontaining a plurality of oblique slots having notches in their edges,

and a plurality of pins on said auxiliary chimney engaging said slotsand adapted to fit into said notches for adjusting and retaining theshade holder at difierent positions on the auxiliary chimney.

12. The combination, with a burner and a chimney of a lamp, of anadjustable auxiliary chimney composed of two tubes, one arranged withinthe other, a shade holder having a flange extending between said tubes,said flange containing a plurality of oblique slots having notches intheir edges, and a plurality of pins passed through said tubes and slotsand adapted to fit into said notches for adjusting and retaining theshade holder at different positions on the auxiliary chimney.

13. A lamp having a burner, a main chimney carried thereby, anauxiliarychimney telescopically mounted with relation to the main.chimney, a shade, and means to support the auxiliary chimney and shadeat a predetermined position with relation to the burner.

14. In a lamp, the combination with a base, and a standard, of a sleeveof substantially the same length as the standard and adapted to turnfreely around said standard, a burner adjustably mounted on said sleeve,a main chimney carried by said burner, and an auxiliary chimney havingmeans whereby said auxiliary chimney is adjustably mounted on saidsleeve in telescopic relation to the main chimney.

15. In a lamp, the combination With a standard having stop members ateach end thereof, of a sleeve mounted to turn freely on said standardand extending substantially into engagement with the stop memberscarried thereby, a burner adjustably secured to said sleeve, a mainchimney and a telescopic auxiliary chimney also mounted on said sleeveand adjustable relative to said burner, said auxiliary chimney beingprovided with a bracket having a plurality of spaced supports to engagethe sleeve. 7

16. In an incandescent lamp having a burner of the blue flame wick type,a chimney carried by the burner, an auxiliary chimney adapted totelescope said burner chimney, and means to support said auxiliarychimney at varying distances relative to the burner chimney to increaseor diminish the volume of air drawn into the burner.

17. In an incandescent mantle lamp of the blue flame type, a burner, amain chimney, and an auxiliary extension chimney supportcd'to telescopethe upper section of the main chimney thereby operating to increase thedraft of the main chimney.

18. In an incandescent mantle lamp of the blue flame type, a burnerhaving a main chimney, an auxiliary chimney adapted to telescope themain. chimney, and means to so support the auxiliary chimney withrelation to the mainchimney as to increase the draft of the burnerthrough the main chimney. I

In testimony whereof, I aflix my signa ture, in presence of twoWitnesses.

CHARLES HAZOR SMITH, Witnesses:

VIoToR S. JoHNsoN, W. M. DANIELS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

